It matters significantly. A security screen door is a complete assembly - frame, mesh, hinges and lock - that has been independently tested and certified to AS5039:2023 (Security Door and Window Screens) by a NATA-accredited laboratory. To pass, the assembly must withstand a dynamic impact test, jemmy test, knife shear test, and probe test under controlled conditions. A product cannot legally be sold as a security screen door in Australia without this certification.

A barrier screen may look identical but has not been independently tested to AS5039. It offers no verified protection against forced entry. When specifying or installing for clients who expect genuine security performance, confirm the product carries current AS5039 certification - not just a claim. Lincoln Sentry stocks Sabretooth mesh, frames, locks and hinges as a compliant system - contact your local branch for specification support.

Door closer EN size ratings (EN1 through EN6) define closing force. EN3 suits standard commercial doors up to 950mm wide in regular use - it is the most commonly specified size for offices, retail and residential entry doors. EN4 and EN5 are required for wider or heavier doors, or any door exposed to constant high traffic. EN6 is the correct rating for heavy-duty doors over 1400mm wide, or in industrial and public access applications.

For fire-rated doors, the door closer must be tested and listed as part of the fire door assembly to AS1905.1. A standard-duty closer will not satisfy this requirement. Any door fitted with a closer should also be fitted with ball-bearing hinges - the continuous spring tension of a closer significantly accelerates wear on plain-bearing hinges. Lincoln Sentry stocks Dormakaba door closers across all EN sizes for commercial and residential applications. Contact your local branch with the door weight, width and application for a confirmed recommendation.

Standard Australian practice is a minimum of two hinges for internal doors and three hinges for external doors. As a rule of thumb, one hinge is required per 760mm of door height - a standard 2040mm residential door should carry three hinges regardless of weight. Any door fitted with a door closer, or used in high-traffic commercial applications, requires a minimum of three hinges with ball bearings.

To estimate door weight for hinge load selection, use: Door Weight (kg) = Specific Gravity x Height (mm) x Width (mm) x Thickness (mm) divided by 1,000,000. Typical specific gravity figures: solid timber 0.9, MDF 0.8, particleboard 0.7. Add 10% for high-traffic use. The combined load capacity of all hinges must exceed the calculated door weight - if in doubt, increase hinge count rather than overloading fewer hinges. Browse the full hinges range, including stainless steel options for external and coastal applications.

Yes. Lincoln Sentry can supply Lockwood locks and cylinders keyed alike (all doors open with the same key), keyed to differ, or configured as part of a master key or grand master key system where different keys open defined subsets of doors within a hierarchy.

Specify keying requirements clearly at the time of ordering - include the number of locks, cylinder type, and whether a master or sub-master system is required. Master key systems need to be planned and ordered in advance; retrofitting a keyed system after individual cylinders have been installed on site is costly and in some cases not possible without rekeying or replacing hardware. If you are specifying a multi-tenancy or multi-access residential or commercial project, speak with your local Lincoln Sentry branch early in the project to ensure the correct cylinder family is selected across all lock types.

A complete Blum REVEGO installation requires five component sets specific to the door width and configuration: the pocket profile, hinge sets, track sets, assembly sets and connector sets. REVEGO is available for single and dual door configurations and supports door leaves up to 25kg per panel. Minimum and maximum door height and width tolerances are specified per system variant - always check the technical data sheet before ordering.

REVEGO is designed for frameless, flush-face cabinetry and joinery applications where a completely concealed door mechanism is required. The system integrates with standard carcass construction without requiring additional structural modification. Component lists, installation guides and technical specifications are available on request from your Lincoln Sentry branch or via the pocket doors section on our website.

A single-point lock secures the door at one location - typically the mid-point of the door. This is sufficient for most residential security doors under 900mm wide where the frame is rigid and there is minimal risk of the door being forced open at the top or bottom. A three-point lock adds locking bolts at the top and bottom of the door in addition to the central latch, preventing the door from being wrenched open at the edges - a recognised forced entry method on single-lock installations.

The NSSA (National Security Screen Association) recommends three-point locking as standard for compliant security doors. It is required on doors over 900mm wide, doors used in commercial applications, and any installation where the frame may flex under load. Lincoln Sentry stocks both single and multi-point locking systems for hinged and sliding security doors. Key cylinders should be a minimum five-pin configuration for AS5039-compliant installations.

For installations within 1km of salt water, or in high-humidity environments such as bathrooms and covered outdoor areas, standard zinc alloy and mild steel hardware will corrode prematurely. The recommended specification for coastal applications is 316 marine-grade stainless steel - this grade contains molybdenum which significantly improves resistance to chloride attack compared to 304 stainless. Powder-coated finishes also perform well provided the underlying substrate is stainless or aluminium, not mild steel.

For hinges, shower screen hardware, and external door furniture, confirm the material grade before specifying in coastal postcodes. Matte black powder coat applied over stainless is a popular finish choice for external coastal doors - the coating provides an additional corrosion barrier without compromising aesthetics. Ask your Lincoln Sentry branch to confirm marine-grade availability within each product range before ordering.

Roller selection for sliding and bifold doors depends on four factors: door weight (kg per leaf), track profile (channel width and shape), door material (timber, aluminium or glass), and frequency of operation. Most residential sliding door rollers are rated to 40-80kg per door panel - exceeding this rating causes premature wheel wear and misalignment. For heavy timber or glass panels, confirm the roller's rated capacity before installation.

Track profile compatibility is equally critical - rollers are not universal across track manufacturers. If replacing rollers on an existing system, bring a sample of the old roller or the track profile to your Lincoln Sentry branch to confirm the correct replacement. For new installations, purchase the track and rollers as a matched system where possible to guarantee compatibility and load performance. Stainless steel rollers are recommended for external and wet-area applications.

Effective acoustic and draught sealing requires coverage at all four edges of the door - top, both sides and the bottom. For the door bottom, an automatic drop seal (a threshold seal that deploys when the door closes and retracts when it opens) provides the best acoustic and draught performance without creating a trip hazard. Perimeter seals - typically co-extruded rubber or pile profiles fitted to the door stop - address the sides and top.

For pure draught control, a standard door seal or door vinyl is usually sufficient. For acoustic performance, seal selection needs to match the acoustic rating of the door itself - a STC-rated door assembly is only as effective as its weakest point, which is most often an unsealed perimeter gap. Brush pile seals are commonly specified for sliding doors where a compressible seal would add too much friction. Contact your local Lincoln Sentry branch with the door type and acoustic or draught requirement for a specific recommendation.

Yes. Lincoln Sentry's Special & Made to Order range covers security doors, commercial door hardware, automatic door systems, and both Sabretooth barrier screens and security screens in custom configurations. Made-to-order items are produced to your specified dimensions and requirements - they are not modified stock items.

Lead times vary by product type and volume. For project planning purposes, initiate made-to-order discussions with your local Lincoln Sentry branch at the design stage rather than the installation stage - custom-dimensioned components cannot be expedited the way stocked items can. Provide your opening dimensions, required hardware specification (lock type, finish, access requirements), and installation date so the branch can confirm production and delivery timing against your project programme.